Interference information processing method and device

ABSTRACT

Disclosed are an interference information processing method and device. The method comprises: a user terminal determining completion of reestablishment of an RRC connection; and the user terminal reporting interference indication information to a target cell. In the embodiment of the present invention, after a connection is established between the user terminal and a target cell except a source cell, the target cell may obtain interference indication information of the user terminal through the user terminal or the source cell, so as to avoid in-device interference of the user terminal according to the interference indication information of the user terminal.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is the U.S. National Stage of International PatentApplication No. PCT/CN2011/080038 filed on Sep. 22, 2011, which claimspriority to Chinese Patent Application No. 201010293295.8 filed on Sep.27, 2010, the disclosures of which are hereby incorporated by referencein their entireties.

FIELD OF THE PRESENT INVENTION

The present invention relates to communication field, in particular toan interference information processing method and equipment.

BACKGROUND OF THE PRESENT INVENTION

Intelligent terminal equipment requires that the same equipment supportsa plurality of radio access technology. For example, the same equipmentsupports LTE (Long Term Evolution) and ISM (Industrial ScientificMedical) (including Bluetooth, WLAN (radio Local Area Network, etc.),LTE and GPS (Global Positioning System) technology at the same time. Ifthese radio access technologies in the same equipment adopt single RFmodule design, the interference between them shall be inevitable, inparticular to the application scene with part of overlapping band oradjacent band.

For example, co-existing interference of equipment between highfrequency part of LTE Band 40 (2300 MHz-2400 MHz) and access technologyof ISM band (such as 2.4 GHz-2.4835 GHz of WLAN); as shown in Table 1:

TABLE 1 LTE ISM Interference Status Receive Send LTE: interfered by ISM,ISM: work normally Send Receive LTE: work normally, ISM: interfered byLTE Receive Receive No co-existing interference Send Send No co-existinginterference

Or co-existing interference of equipment between LTE Band 13 (777-787MHz, 746-756 MHz) or Band 14 (788-798 MHz, 758-768 MHz) and GPS (such as1575.42 MHz) technology; as shown in Table 2:

TABLE 2 LTE GPS Interference Status Send Receive LTE: work normally,GPS: interfered by LTE Receive Receive No co-existing interference

It should be noted that, a radio system has no interference on othersystems when in IDLE status (LTE monitoring paging, WLAN monitoringbeacon and Bluetooth sniff).

When a base station of the LTE system is deployed in a plurality ofbands, UE (User Equipment) is actually the band that can avoid thein-device interference. Co-existing interference of frequency domain issolved mainly depending on the reestablishment of a radio link afterfailure and handover process of control at network side. When the UE islocated in interference band, quality of the radio link detected by theUE is worsened, which will cause failure of radio link. The UE canselect to establish connection in the cell of non-interference bandthrough triggering a reestablishment of connection. The UE is requiredto provide the base station with certain information when the UE isreporting auxiliary base station handover process and base station blindhandover process base on measurement, so that the base stationconfigures for measurement of interference band to avoid handover the UEinto interference band. The information that the UE transfers to thebase station is called interference indication information.

Interference indication information transferred to the base station bythe UE under connection state can assist the base station to avoidinterference with the purpose of not affecting the user experience. Whenthe UE triggers to be reconstructed or switched to other cells underconnection state due to failure of radio link, the target base stationis required to be able to avoid rehandover the UE to interference band.However, the target base station in prior art cannot acquire theinterference indication information of the UE and cannot effectivelyavoid rehandover the UE to interference band.

SUMMARY OF THE PRESENT INVENTION

The embodiments of the present invention provide an interferenceinformation processing method and equipment, which enables that thetarget cell can acquire interference indication information of the UEwhen setting up connection in the target cell other than the UE and asource cell.

The embodiments of the present invention provide an interferenceinformation processing method, which comprises:

A user terminal determining completion of reestablishment of an RRC;

The user terminal reporting interference indication information to thetarget cell.

The embodiments of the present invention provide an interferenceinformation processing method, which comprises:

The user terminal determining completion of cell handover;

The user terminal reporting interference indication information to thetarget cell.

The embodiments of the present invention provide an interferenceinformation processing method, which comprises:

The source cell judging whether the UE is switched;

The source cell sending the interference indication information reportedby the UE to the target cell during UE handover.

The embodiments of the present invention provide an interferenceinformation processing method, which comprises:

The base station that the target cell locates in receiving theinterference indication information of the UE during UE handover orreestablishment of an RRC connection;

The base station that the target cell locates in controlling to avoidin-device interference of the UE according to the interferenceindication information of the UE.

The embodiments of the present invention provide a user terminal, whichcomprises:

Determination unit, which is used to determine completion ofreestablishment of an RRC connection;

Reporting unit, which is used to report the interference indicationinformation to the target cell.

The embodiments of the present invention provide a user terminal, whichcomprises:

Determination unit, which is used to determine completion of cellhandover;

Reporting unit, which is used to report the interference indicationinformation to the target cell.

The embodiments of the present invention provide a base station, whichcomprises:

Judgment unit, which is used to judge whether the UE is switched;

Sending unit, which is used to send the interference indicationinformation reported by the UE to the target cell during UE handover.

The embodiments of the present invention provide a base station, whichcomprises:

Receiving unit, which is used to receive the interference indicationinformation of the UE during UE handover or reestablishment of an RRCconnection;

Control unit, which is used to control to avoid in-device interferenceof the UE according to the interference indication information of theUE.

Compared with the prior art, the embodiments of the present invention atleast have the following advantages:

The target cell can acquire the interference indication information ofthe user terminal through the user terminal or the source cell after theuser terminal is connected to the target cell rather than the sourcecell, so as to further avoid the in-device interference of the userterminal according to the interference indication information of theuser terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

To describe the embodiments or the technical programs in prior art ofthe present invention clearly, brief description of the drawing requiredto be used in embodiments or prior art description of the presentinvention is made. It is clear that the drawings in descriptions beloware only some embodiments of the present invention. Technical personnelof the field can acquire other drawings according to these drawings inthe absence of creative work,

FIG. 1 is a flow diagram of interference information processing methodof embodiment I of the present invention;

FIG. 2 is a flow diagram of interference information processing methodof embodiment II of the present invention;

FIG. 3 is a flow diagram of interference information processing methodof embodiment III of the present invention;

FIG. 4 is a flow diagram of interference information processing methodof embodiment IV of the present invention;

FIG. 5 is a structural diagram of user terminal of embodiment V of thepresent invention;

FIG. 6 is a structural diagram of user terminal of embodiment VI of thepresent invention;

FIG. 7 is a structural diagram of base station of embodiment VII of thepresent invention;

FIG. 8 is a structural diagram of base station of embodiment VIII of thepresent invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE PRESENT INVENTION

In the following parts, clear and complete descriptions of thetechnology programs in embodiments of the present invention are madecombined with drawings of the embodiments. It is clear that theembodiments described here are only parts of the embodiments of thepresent invention. According to the embodiments of the presentinvention, any other embodiments made by technical personnel of thefield in the absence of creative work all belong to the scope of thepatent protection of the invention.

Embodiment I

Embodiment I of the present invention provides an interferenceinformation processing method, as shown in FIG. 1, which comprises:

Step 101, the user terminal determines completion of reestablishment ofan RRC (Radio Resource Control) connection.

Step 102, the user terminal reports the interference indicationinformation to the target cell.

During connection reestablishment of the UE, working status of otherradio equipment in equipment may not change (such as startup orshutdown); the UE will not receive again the interference indicationinformation triggered and sent in equipment after connectionreestablishment under normal condition. If the user terminal hasreported the interference indication information before thereestablishment of an RRC connection, the user terminal reports theinterference indication information to the target cell, comprising: theuser terminal reporting the interference indication informationrepeatedly. The reason the UE does no report the interference indicationinformation to the target cell before connection reestablishment may layin that there is no co-existing in-device interference, so it is allowednot to report the interference indication information after connectionreestablishment.

The user terminal reports the interference indication information to thetarget cell, comprising: the user terminal judges whether there is newco-existing interference triggered after reestablishment of an RRCconnection; if not, the user terminal reports the interferenceindication information repeatedly; if yes, the user terminal triggersand updates the interference indication information according to the newco-existing interference and then reports it.

Embodiment II

Embodiment II of the present invention provides an interferenceinformation processing method, as shown in FIG. 2, which comprises:

Step 201, the user terminal determines the completion of cell handover;

Step 202, the user terminal reports the interference indicationinformation to the target cell.

During UE handover, working status of other radio equipment in equipmentmay not change (such as startup or shutdown); the UE will not receiveagain the interference indication information triggered and sent inequipment after handover under normal condition. It is specified in theprogram that the UE reports the interference indication informationrepeatedly after handover to inform to switch target cell to avoidinterference and other related operations, viz. if the user terminal hasreported the interference indication information before cell handover,the user terminal reports the interference indication information to thetarget cell, comprising: the user terminal reporting the interferenceindication information repeatedly. If the UE does no report theinterference indication information to the target cell before handover,the UE will not report repeatedly after handover. The reason for the UEdoes not report the interference indication information may lay in thereis no co-existing interference triggered in equipment.

The user terminal reports the interference indication information to thetarget cell, comprising: the user terminal judges whether there is newco-existing interference triggered after cell handover; if not, the userterminal reports the interference indication information repeatedly; ifyes, the user terminal triggers and updates the interference indicationinformation according to the new co-existing interference and thenreports it.

Embodiment III

Embodiment III of the present invention provides an interferenceinformation processing method, as shown in FIG. 3, which comprises:

Step 301, the source cell judges whether the UE is switched;

Step 302, the source cell sends the interference indication informationreported by the UE to the target cell during UE handover.

The source cell sends the interference indication information reportedby the UE to the target cell, comprising: the source cell sending theinterference indication information to the target cell by carrying it incontext of the user terminal.

The source cell will transfer the UE context saved therein to the targetnetwork side through handover preparation message when judging the UE isunder handover, and the target network side will issue handover commandto the UE through a source network side, viz. RRC connects andreconfigures message, and the UE switches.

It should be noted that of the source cell does not receive theinterference indication information reported by the UE when sending thehandover preparation message, or sending UE context, the interferenceindication information will not be carried in the message sent to thetarget cell.

Embodiment IV

Embodiment IV of the present invention provides an interferenceinformation processing method, as shown in FIG. 4, which comprises:

Step 401, the base station that the target cell locates in receives theinterference indication information of the UE during UE handover orreestablishment of an RRC connection;

Step 402, the base station that the target cell locates in controls toavoid the interference in UE equipment according to the interferenceindication information of the UE.

The received interference indication information of the UE comprises:

receiving the interference indication information sent by the UE or thesource cell during UE handover; receiving the interference indicationinformation sent by the UE during reestablishment of an RRC connectionof the UE.

The received interference indication information sent by the source cellis specifically carried in the UE context, or interface message (such asS1 interface message and S2 interface message).

After receiving the request of reestablishment of an RRC connection fromthe UE, it means reestablishment succeeds if the UE context is saved,otherwise, the reestablishment fails.

Embodiment V

Embodiment V of the present invention provides a user terminal, as shownin FIG. 5, which comprises:

Determination unit 11, which is used to determine the completion ofreestablishment of an RRC connection;

Reporting unit 12, which is used to report the interference indicationinformation to the target cell.

The reporting unit 12 is also used to report the interference indicationinformation repeatedly if the user terminal has reported theinterference indication information before the reestablishment of an RRCconnection.

The reporting unit 12 is also used to:

Judge whether there is new co-existing interference triggered after thereestablishment of an RRC connection;

If not, report the interference indication information repeatedly;

If yes, trigger and update the interference indication informationaccording to the new co-existing interference and then report it.

Embodiment VI

Embodiment VI of the present invention provides a user terminal, asshown in FIG. 6, which comprises:

Determination unit 21, which is used to determine the completion of cellhandover;

Reporting unit 22, which is used to report the interference indicationinformation to the target cell.

The reporting unit 22 is also used to report the interference indicationinformation repeatedly if the user terminal has reported theinterference indication information before the cell handover.

The reporting unit 22 is also used to:

Judge whether there is new co-existing interference triggered after thecell handover;

If not, report the interference indication information repeatedly;

If yes, trigger and update the interference indication informationaccording to the new co-existing interference and then report it.

Embodiment VII

Embodiment VII of the present invention provides a base station, asshown in FIG. 7, which comprises:

Judgment unit 31, which is used to judge whether the UE is switched;

Sending unit 32, which is used to send the interference indicationinformation reported by the UE to the target cell during UE handover.

The sending unit 32 is also used to send the interference indicationinformation to the target cell by carrying it in the context of the userterminal or the interface message.

The sending unit 32 is also used to send the interference indicationinformation to the target cell through handover preparation message whenthe source cell judges the UE is switched.

Embodiment VIII

Embodiment VIII of the present invention provides a base station, asshown in FIG. 8, which comprises:

Receiving unit 41, which is used to receive the interference indicationinformation of the UE during UE handover or reestablishment of an RRCconnection;

Control unit 42, which is used to control to avoid the in-deviceinterference of the UE according to the interference indicationinformation of the UE.

The receiving unit 41 is also used to receive the interferenceindication information sent by the UE or the source cell during UEhandover; receive the interference indication information sent by the UEduring reestablishment of an RRC connection of the UE.

The receiving unit 41 is also used to receive the UE context or theinterface message sent by the source cell; the context or the interfacemessage carries the interference indication information.

Through the description of the embodiments above, the technicalpersonnel in this field can understand clearly that the presentinvention can be implemented by software and necessary general hardwareplatform or hardware (the former is better in most cases). Based on thisunderstanding, the technical program or the part making contributions tothe prior art of the present invention can be embodied by a form ofsoftware products essentially which can be stored in a storage medium,including a number of instructions for making a computer device (such aspersonal computers, servers, or network equipments, etc.) implement themethods described in the embodiments of the present invention.

The technical personnel in this field can be understood that theillustration is only schematic drawings of a preferred embodiment, andthe module or process is not necessary for the implementation of thepresent invention.

The technical personnel in this field can be understood that the modulescan be distributed in device of the embodiments according to thedescription of the embodiments above, and also can be varied in one ormultiply device of the embodiments. The modules of the embodiments canbe combined into a module, and also can be further split into severalsub-modules.

The number of the embodiments is only to describe, it does not representthe pros and cons of the embodiments.

The descriptions above are just preferred implement ways of the presentinvention. It should be pointed that, for general technical personnel inthis field, some improvement and decorating can be done, which should beas the protection scope of the present invention.

The invention claimed is:
 1. A method for processing interferenceinformation, comprising: determining, by a user terminal, completion ofreestablishment of a Radio Resource Control (RRC) connection; andreporting, by the user terminal, interference indication information toa target cell repeatedly, in a case that the user terminal has reportedthe interference indication information before the reestablishment ofthe RRC connection, wherein the target cell is a cell among cells towhich the user terminal is to connect by the reestablishment of the RRCconnection or is to connect by handover, except a source cell that iscurrently providing service to the user terminal; and wherein theinterference indication information is information that is used toprevent the user terminal from being switched to interference frequencybands.
 2. The method according to claim 1, wherein the reporting, by theuser terminal, the interference indication information to the targetcell comprises: determining, by the user terminal, whether there is anew mutual interference trigger after the reestablishment of the RRCconnection; and reporting, by the user terminal, the interferenceindication information repeatedly, if there is not; or updating, by theuser terminal, the interference indication information according to thenew mutual interference trigger, and then reporting the updatedinformation, if there is, wherein the mutual interference triggerindicates that the reestablishment of the RRC connection is triggereddue to mutual interference among a plurality of different wirelessaccess technologies supported by the user terminal.
 3. The methodaccording to claim 1, further comprising: determining, by the userterminal, completion of cell handover; and reporting, by the userterminal, the interference indication information to the target cell. 4.The method according to claim 3, wherein in a case that the userterminal has reported the interference indication information before thecell handover, the reporting, by the user terminal, the interferenceindication information to the target cell comprises: reporting, by theuser terminal, the interference indication information repeatedly. 5.The method according to claim 4, wherein the reporting, by the userterminal, the interference indication information to the target cellcomprises: determining, by the user terminal, whether there is a newmutual interference trigger after the cell handover; and reporting, bythe user terminal, the interference indication information repeatedly,if there is not; or updating, by the user terminal, the interferenceindication information according to the new mutual interference trigger,and then reporting the updated information, if there is, wherein themutual interference trigger indicates that the reestablishment of theRRC connection is triggered due to mutual interference among a pluralityof different wireless access technologies supported by the userterminal.
 6. A method for processing interference information,comprising: determining, by a source cell, whether a user terminal issubject to handover; and sending, by the source cell, interferenceindication information reported by the user terminal to a target cellduring the handover, wherein the target cell is a cell among cells towhich the user terminal is to connect by the reestablishment of the RRCconnection or is to connect by handover, except the source cell that iscurrently providing service to the user terminal; and wherein theinterference indication information is information that is used toprevent the user terminal from being switched to interference frequencybands.
 7. The method according to claim 6, wherein the sending, by thesource cell, the interference indication information reported by theuser terminal to the target cell comprises: encapsulating, by the sourcecell, the interference indication information within a contextinformation of the user terminal, and then sending the resultant to thetarget cell.
 8. The method according to claim 7, wherein the sending, bythe source cell, the interference indication information reported by theuser terminal to the target cell comprises: sending, by the source cell,the interference indication information to the target cell throughhandover preparation message, when the source cell determines that theuser terminal is subject to handover.
 9. A method for processinginterference information, comprising: receiving, by a base stationwithin a target cell, interference indication information of a userterminal, when the user terminal is subject to handover or a RadioResource Control (RRC) connection is reestablished; and controlling, bythe base station, according to the interference indication informationof the user terminal, so as to avoid intra-device interference of theuser terminal, wherein the target cell is a cell among cells to whichthe user terminal is to connect by the reestablishment of the RRCconnection or is to connect by handover, except a source cell that iscurrently providing service to the user terminal; and wherein theinterference indication information is information that is used toprevent the user terminal from being switched to interference frequencybands.
 10. The method according to claim 9, wherein the receiving, bythe base station, interference indication information of the userterminal comprises: receiving, by the base station, the interferenceindication information sent by the user terminal or a source cell, whenthe user terminal is subject to the handover; or receiving, by the basestation, the interference indication information sent by the userterminal, when the RRC connection is reestablished by the user terminal.11. The method according to claim 10, wherein the received interferenceindication information sent by the source cell is encapsulated withinthe context information of the user terminal or an interface message.